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Re: [EXT]Removing CSS Background image for legibility an Accessibility requirement?

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From: Jared Smith
Date: Mar 15, 2022 10:52AM

> This is essentially testing that once a user has customised their experience, things still work, which is outside of WCAG.

As a counter-point, the Resize Text, Reflow, User of Color, and Text Spacing success criteria in WCAG all require certain levels of support and accessibility after end-user customizations have been applied. All of these - resizing text, zooming, overriding colors or text styles, etc. - can result in text with very low or no contrast if a background color is not defined or inherited. In these cases, text might be repositioned outside the boundaries of a background image or the system may not be able to calculate sufficient color changes when a background is in place, but not a fall-back CSS background color. G183 supports text accessibility in these cases.

Additionally, images might fail to download or the user might be in a very low bandwidth environment, so having a fall-back color ensures legible text in these situations that may be out of the user's control.

Jared Smith
WebAIM